{"artifact_id":"L1-411","layer":"L1","title":"Oxygen Transport (Krogh Cylinder)","domain":"Computational Biology","sub_domain":"Physiology","physics_fingerprint":{"L_DAG":2.8,"title":"Oxygen Transport (Krogh Cylinder)","domain":"Computational Biology","carrier":"N/A","primitives":["D.space","S.fdm.oxygen_diffusion","O.chi2.po2_profile"],"sub_domain":"Physiology","noise_model":"gaussian","problem_class":"parameter_estimation","solution_space":"oxygen_distribution_field","difficulty_delta":3,"integration_axis":"radial_tissue","sensing_mechanism":"po2_measurement_fiber_optic"},"observable_profile":{"metric":"pO2_profile_RMSE_mmHg","regime":"Existence of the recovered oxygen_distribution_field is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 50); non_uniform_capillary_spacing dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Gaussian sets the irreducible data-fidelity floor.","secondary":"anoxic_fraction_error"},"size_tiers":{"center_spec":{"omega":{"R_t_tissue_um":50,"Q_max_mlO2_ml_s":0.0005,"arterial_pO2_mmHg":100,"capillary_radius_um":5},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"po2_measurement_fiber_optic","epsilon_fn_center":"5 pO2_profile_RMSE_mmHg"},"omega_bounds":{"R_t_tissue_um":[10,200],"Q_max_mlO2_ml_s":[0.0001,0.005],"arterial_pO2_mmHg":[50,150],"capillary_radius_um":[2,20]},"epsilon_bounds":{"pO2_profile_RMSE_mmHg":[0.5,30]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["capillary_radius_um","R_t_tissue_um","Q_max_mlO2_ml_s","arterial_pO2_mmHg"],"allowed_forward_operators":["po2_measurement_fiber_optic"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":1000,"metric":"pO2_profile_RMSE_mmHg"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x04892ea35760c3889fa934f728182804e3f053623ababf6b45d343a17885cbca","chain_tx_hash":"0x5e5eb665acbb6f52a4a75a7ab90a69309f68eafff1619f8289bc502746e887ac","chain_block":41555219}